Update README.md

Updated alpine line deps

Author: iboates

README.md

@@ -117,8 +117,9 @@ pkg install devel/cmake devel/boost-libs textproc/expat2 \
 On Alpine, use
 
 ```sh
-apk --update-cache add cmake make g++ boost-dev expat-dev \
-  bzip2-dev zlib-dev libpq nlohmann-json proj-dev lua5.3-dev postgresql-dev
+apk --update-cache add cmake make g++ nlohmann-json \
+  postgresql-dev boost-dev expat-dev bzip2-dev zlib-dev \
+  libpq proj-dev lua5.3-dev luajit-dev
 ```
 
 Once dependencies are installed, use CMake to build the Makefiles in a separate